Yes, the undivided share can be transferred by way of registered sale deed signed by the other two owners as witnesses. But later the purchaser will give legal notice to the all the owners to to demarcate his property out of the undivided property. If there is no response from them, the purchaser can file a partition suit before the concerned civil court.
To transfer the property you require the document showing how you got the property (i.e. your vendor sale deed and its link document), Encumbrance certificate, Municipal Tax, Clearance or update payment of electricity, water bills etc and ofcourse a legal opinion from your lawyer verifying the title of the property.